Dirac

"These neutrino observations are so exciting and significant that I think we're about to see the birth of an entirely new branch of astronomy: neutrino astronomy." -John Bahcall
You've been around here long enough to know about the Big Bang. The vast majority of galaxies are speeding away from us, but more than that, the farther away they are from us, the faster they appear to be receding.
Image credit: ESA/Hubble, NASA and H. Ebeling.
But it's more than that; when you look at a distant galaxy, because the speed of light is finite, you're actually looking at it in the distant past. Since…

SteelyKid, like most toddlers, knows a few songs, and likes to sing them over and over. Her repertoire is limited to "ABCDEFG" (the alphabet song, but that's how she requests it), "Twinkle, Twinkle," "Some man" ("This Old Man," which I only figured out this weekend), and "Round and Round" ("The Wheels on the Bus"). I get a little bored with the repetition, and so tend to make up my own verses, which get sideways looks from her, followed by telling Kate "Daddy's silly!"
I've been posting a lot of these on Twitter over the past several days (@orzelc), but for posterity, a few physics-related…

Over in yesterday's communications skills post commenter Paul raises a question about priorities:
I wonder to what extent good writers, public speakers and communicators are being promoted in science in place of good thinkers - people who can challenge prevailing dogma, invent promising novel approaches to old problems, and who have the intuition needed for deducing correct theories from just a few observations.
I think of this as the "Weinstein Perelman Theory" because Eric Weinstein on Twitter has been pushing something similar with respect to Grisha Perelman turning down major math…

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"In the future, maybe quantum mechanics will teach us something equally chilling about exactly how we exist from moment to moment of what we like to think of as time." -Richard K. Morgan
It’s absolutely true that, in quantum mechanics, there are certain pairs of properties that we simply can’t measure simultaneously. Measure the position of an object really well, and its momentum becomes more…

In case you didn't know, reality is science fiction.
If you doubt me, read the news. Read, for example, this recent article in the New York Times about Carnegie Mellon's "Read the Web" program, in which a computer system called NELL (Never Ending Language Learner) is systematically reading the internet and analyzing sentences for semantic categories and facts, essentially teaching itself…

Blurring, chopping and blocking. Three online items this week all deal with some pretty dynamic phenomena.
The blurring is in our perceptions. It turns out that if you even think you have lost money in an experiment, your ability to distinguish between musical notes will be hampered. What’s the connection? Dr. Rony Paz has been showing that this tendency to lump sounds together is tied to fear.…